APA aipamena

Walker Sally M. (2010). Early Bird Earth Science Rocks. Lerner.

Chicago Style aipamena

Walker Sally M. Early Bird Earth Science Rocks. Lerner, 2010.

MLA aipamena

Walker Sally M. Early Bird Earth Science Rocks. Lerner, 2010.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.